<template>
  <div class="xtx-goods-page" v-if="goods">
    <div class="container">
      <!-- 面包屑 -->
      <XtxBread>
        <XtxBreadItem to="/">首页</XtxBreadItem>
        <XtxBreadItem :to="'/category/' + goods.categories[0].id">{{
          goods.categories[0].name
        }}</XtxBreadItem>
        <XtxBreadItem :to="'/category/sub/' + goods.categories[1].id">{{
          goods.categories[1].name
        }}</XtxBreadItem>
        <XtxBreadItem>{{ goods.name }}</XtxBreadItem>
      </XtxBread>
      <!-- 商品信息 -->
      <div class="goods-info">
        <div class="media">
          <!-- 商品照片组件 -->
          <goods-image :images="goods.mainPictures" />
          <goods-sales />
        </div>
        <div class="spec">
          <!-- 名字区组件 -->
          <goods-name :goods="goods" />
          <!-- 规格组件 -->
          <goods-sku :goods="goods" @change="changeSku"></goods-sku>
          <!-- 数量选择组件 -->
          <XtxNumbox
            label="数量"
            v-model="num"
            :max="goods.inventory"
          ></XtxNumbox>
          <!-- 按钮 -->
          <XtxButton
            type="primary"
            style="margin-top: 20px"
            @click="insertCart()"
            >加入购物车</XtxButton
          >
        </div>
      </div>
      <!-- 商品推荐 -->
      <GoodsRelevant :goodsId="goods.id" />
      <!-- 商品详情 -->
      <div class="goods-footer">
        <div class="goods-article">
          <!-- 商品+评价 -->
          <goods-tabs :goods="goods"></goods-tabs>
          <!-- 注意事项 -->
          <goods-warn></goods-warn>
        </div>
        <!-- 24热榜+专题推荐 -->
        <div class="goods-aside">
          <goods-hot :goodsId="goods.id" :type="1"></goods-hot>
          <goods-hot :goodsId="goods.id" :type="2"></goods-hot>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { nextTick, watch, ref, provide} from "vue";
import { useRoute } from "vue-router";
import GoodsRelevant from "./components/goods-relevant";
import { findGoods } from "@/api/product";
import GoodsImage from "./components/goods-image.vue";
import GoodsSales from "./components/goods-sales.vue";
import GoodsName from "./components/goods-name.vue";
import GoodsSku from "./components/goods-sku.vue";
import GoodsTabs from "./components/goods-tabs.vue";
import GoodsHot from "./components/goods-hot.vue";
import GoodsWarn from "./components/goods-warn.vue";
import { useStore } from "vuex";
import Message from '@/components/library/Message';
export default {
  name: "XtxGoodsPage",
  components: {
    GoodsRelevant,
    GoodsImage,
    GoodsSales,
    GoodsName,
    GoodsSku,
    GoodsTabs,
    GoodsHot,
    GoodsWarn,
  },
  setup() {
    // 选择的数量
    const num = ref(1);
    const goods = useGoods();
    // sku改变时函数
    const changeSku = (sku) => {
      if (sku.skuId) {
        goods.value.price = sku.price;
        goods.value.oldPrice = sku.oldPrice;
        goods.value.inventory = sku.inventory;
      }
      // 记录选择后的sku，可能有数据，可能没有数据{}
      currSku.value = sku;
    };
    // 提供goods数据给后代组件使用
    provide("goods", goods);

    // 加入购物车逻辑
    // const currSku = ref(null);
    // const instance = getCurrentInstance();
    // const store = useStore();
    // const insertCart = () => {
    //   if (!currSku.value) {
    //     return instance.proxy.$message("请选择商品规模");
    //   }
    //   if (num.value > goods.inventory) {
    //     return instance.proxy.$message("库存不足");
    //   }
    //   store
    //     .dispatch("cart/insertCart", {
    //       id: goods.value.id,
    //       skuId: currSku.value.skuId,
    //       name: goods.value.name,
    //       picture: goods.value.mainPictures[0],
    //       price: currSku.value.price,
    //       nowPrice: currSku.value.price,
    //       count: num.value,
    //       attrsText: currSku.value.specsText,
    //       selected: true,
    //       isEffective: true,
    //       stock: currSku.value.inventory,
    //     })
    //     .then(() => {
    //       instance.proxy.$message("加入购物车", "success");
    //     });
    // };
    // 加入购物车
    const store = useStore()
    const currSku = ref(null)
    const insertCart = () => {
      if (currSku.value && currSku.value.skuId) {
        // id skuId name attrsText picture price nowPrice selected stock count isEffective
        const { skuId, specsText: attrsText, inventory: stock } = currSku.value
        const { id, name, price, mainPictures } = goods.value
        store.dispatch('cart/insertCart', {
          skuId,
          attrsText,
          stock,
          id,
          name,
          price,
          nowPrice: price,
          picture: mainPictures[0],
          selected: true,
          isEffective: true,
          count: num.value
        }).then(() => {
          Message({ type: 'success', text: '加入购物车成功' })
        })
      } else {
        Message({ text: '请选择完整规格' })
      }
    }

    return { goods, changeSku, num, insertCart };
  },
};

// 获取商品详情
const useGoods = () => {
  // 出现路由地址商品ID发生变化，但是不会重新初始化组件
  const goods = ref(null);
  const route = useRoute();
  watch(
    () => route.params.id,
    (newVal) => {
      if (newVal && `/product/${newVal}` === route.path) {
        findGoods(route.params.id).then((data) => {
          // 让商品数据为null让后使用v-if的组件可以重新销毁和创建
          goods.value = null;
          nextTick(() => {
            goods.value = data.result;
            // console.log(goods,'goods');
          });
        });
      }
    },
    { immediate: true }
  );
  return goods;
};
</script>

<style scoped lang='less'>
.goods-info {
  min-height: 600px;
  background: #fff;
  display: flex;
  .media {
    width: 580px;
    height: 600px;
    padding: 30px 50px;
  }
  .spec {
    flex: 1;
    padding: 30px 30px 30px 0;
  }
}
.goods-footer {
  display: flex;
  margin-top: 20px;
  .goods-article {
    width: 940px;
    margin-right: 20px;
  }
  .goods-aside {
    width: 280px;
    min-height: 1000px;
  }
}
// .goods-tabs {
//   min-height: 600px;
//   background: #fff;
// }
// .goods-warn {
//   min-height: 600px;
//   background: #fff;
//   margin-top: 20px;
// }
</style>